vascular system

Question 1

what is the vascular system made up of

Answer 1

made up of blood vessels that carry blood through the body to deliver oxygen and nutrients to the body and tissues and take away waste products

Question 2

2 types of circulation

Answer 2

1. pulmonary - deoxygenated blood from the heart to the lungs and oxygenated blood back to the heart
2. systemic - oxygenated blood to the body from the heart and then the return of deoxygenated blood from the body to the heart

Question 3

pulmonary

Answer 3

deoxygenated blood from the heart to the lungs and oxygenated blood back to the heart

Question 4

systemic

Answer 4

oxygenated blood to the body from the heart and then the return of deoxygenated blood from the body to the heart

Question 5

list the 5 blood vessels in order

Answer 5

heart -> arteries -> arterioles -> capillaries -> venues -> veins -> heart

Question 6

viens

Answer 6

• thinner muscle/elastic tissue layers

- blood is at a lower pressure and they have valves and a wider lumen

Question 7

arteries

Answer 7

• highest pressure

- smaller lumen and smooth inner layer

Question 8

capillaries

Answer 8

• only wide enough to allow one red blood cell to pass through which slows down blood flow and allows the exchange of nutrients with the tissues to take place by diffusion

Question 9

blood pressure

Answer 9

force exerted by the blood against the blood vessel wall

- blood flow x resistance

Question 10

systolic pressure

Answer 10

the pressure in the arteries when the ventricles are contracting

Question 11

diastolic pressure

Answer 11

the pressure in the arteries when the ventricles are relaxing

Question 12

explain what happens when the heart contracts

Answer 12

• when heart contracts it forces blood out under high pressure = systolic pressure
• the lower pressure as the ventricles relax = diastolic pressure

Question 13

where is blood pressure measured

Answer 13

at the brachial artery in the upper arm

Question 14

blood pressure is dependant on:

Answer 14

• the blood vessel
• which is dependant on the distance of the blood vessel from the heart
  (the low pressure in the veins means that mechanisms are needed to pump the blood back to the heart)